bug#41908: guix time-machine fails; XXXX is not related to introductory commit of channel 'guix'

[zimoun]

Hi Ludo,

On Sun, 21 Jun 2020 at 17:43, Ludovic Courtès <ludo@gnu.org> wrote:

> I removed that test in e4a4287c5fb51c0e47431606df5ee78b953d71f8; we can
> keep the introductory commit unchanged, all is good!  Let me know what
> you think.

Now the sequences never return an error. Nice!

For the record, the history is:

* 41a2d6a8b9 (newer)
* e70e097882 (between)
* 36640207c9 (older)

--8<---------------cut here---------------start------------->8---
$ guix pull --commit=e4a4287c5fb51c0e47431606df5ee78b953d71f8 -p /tmp/c
$ cat ~/.cache/guix/authentication/channels/guix
cat: /home/simon/.cache/guix/authentication/channels/guix: No such file or 
directory
--8<---------------cut here---------------end--------------->8---

Let consider this first sequence.

--8<---------------cut here---------------start------------->8---
$ /tmp/c/bin/guix time-machine --commit=e70e097882 -- help
Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Authenticating channel 'guix', commits 9edb3f6 to e70e097 (668 new commits)...
$ cat ~/.cache/guix/authentication/channels/guix
;; List of previously-authenticated commits.

("e70e097882699865f63eabc5fb29b4fe4468a97b")

$ /tmp/c/bin/guix time-machine --commit=41a2d6a8b9 -- help
Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Authenticating channel 'guix', commits 9edb3f6 to 41a2d6a (4 new commits)...
$ cat ~/.cache/guix/authentication/channels/guix
;; List of previously-authenticated commits.

("41a2d6a8b9294a6eb8e97aaefd569e755f5f461e"
 "e70e097882699865f63eabc5fb29b4fe4468a97b")

$ /tmp/c/bin/guix time-machine --commit=36640207c9 -- help
Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Usage: guix COMMAND ARGS...

$ cat ~/.cache/guix/authentication/channels/guix
;; List of previously-authenticated commits.

("41a2d6a8b9294a6eb8e97aaefd569e755f5f461e"
 "e70e097882699865f63eabc5fb29b4fe4468a97b")
--8<---------------cut here---------------end--------------->8---

However, the commit 36640207c9 is not considered as authenticated,
right?  So, the older authenticated commit is the first commit used by
time-machine, right?


Let consider this second sequence.

--8<---------------cut here---------------start------------->8---
$ rm ~/.cache/guix/authentication/channels/guix

$ /tmp/c/bin/guix time-machine --commit=36640207c9 -- help
Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Authenticating channel 'guix', commits 9edb3f6 to 3664020 (664 new commits)...

$ /tmp/c/bin/guix time-machine --commit=41a2d6a8b9 -- help
Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Authenticating channel 'guix', commits 9edb3f6 to 41a2d6a (8 new commits)...

$ cat ~/.cache/guix/authentication/channels/guix
;; List of previously-authenticated commits.

("41a2d6a8b9294a6eb8e97aaefd569e755f5f461e"
 "36640207c9543e48cd6daa92930f023f80065a5d")

$ /tmp/c/bin/guix time-machine --commit=e70e097882 -- help
Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Usage: guix COMMAND ARGS...

$ cat ~/.cache/guix/authentication/channels/guix
;; List of previously-authenticated commits.

("41a2d6a8b9294a6eb8e97aaefd569e755f5f461e"
 "36640207c9543e48cd6daa92930f023f80065a5d")
--8<---------------cut here---------------end--------------->8---

The commit e70e097882 between 36640207c9 and 41a2d6a8b9 is not
considered as authenticated, right?


Cheers,
simon